As an electronics project, I would like to create a PCB that generates random blinking lights similar to the computer panel props featured in late 60s/70s era television series:
The scale is possibly deceptive from this screenshot, but the lights were probably about 10mm overall in diameter. I assume that these were miniature filament bulbs inside a colored plastic housing and I remember seeing them used in my friends' hobby projects well into the mid 1980s, but I have drawn a blank as to what they are called, whether they were manufactured as a sealed unit or the lights and housing could be purchased separately, and whether they are still available to buy. What I am trying to recreate is the look of the lights and to use components from the time if possible.
Thank you in advance for any suggestions or advice.